com.profesorfalken.wmi4java.WMIPowerShell Maven / Gradle / Ivy

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API to query WMI from Java
There is a newer version: 1.6.3
/*
 * Copyright 2016 Javier Garcia Alonso.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.profesorfalken.wmi4java;

import com.google.common.base.Joiner;
import com.profesorfalken.jpowershell.PowerShell;
import com.profesorfalken.jpowershell.PowerShellNotAvailableException;
import com.profesorfalken.jpowershell.PowerShellResponse;

import java.util.Collections;
import java.util.List;

/**
 * WMI Stub implementation based in PowerShell (jPowerShell)
 * 
 * @author Javier Garcia Alonso
 */
class WMIPowerShell implements WMIStub {
    private static final String NAMESPACE_PARAM = "-Namespace ";
    private static final String GETWMIOBJECT_COMMAND = "Get-WMIObject ";    

    private static String executeCommand(String command) throws WMIException {
        String commandResponse = null;
        PowerShell powerShell = null;
        try {
            powerShell = PowerShell.openSession();
            PowerShellResponse psResponse = powerShell.executeCommand(command);

            if (psResponse.isError()) {
                throw new WMIException("WMI operation finished in error: "
                        + psResponse.getCommandOutput());
            }

            commandResponse = psResponse.getCommandOutput().trim();

            powerShell.close();
        } catch (PowerShellNotAvailableException ex) {
            throw new WMIException(ex.getMessage(), ex);
        } finally {
            if (powerShell != null) {
                powerShell.close();
            }
        }

        return commandResponse;
    }

    @Override
    public String listClasses(String namespace, String computerName) throws WMIException {
        String namespaceString = "";
        if (!"*".equals(namespace)) {
            namespaceString += NAMESPACE_PARAM + namespace;
        }

        return executeCommand(GETWMIOBJECT_COMMAND
                + namespaceString + " -List | Sort Name");
    }

    @Override
    public String listProperties(String wmiClass, String namespace, String computerName) throws WMIException {
        String command = GETWMIOBJECT_COMMAND + wmiClass + " ";

        if (!"*".equals(namespace)) {
            command += NAMESPACE_PARAM + namespace;
        }

        command += " | ";

        command += "Select-Object * -excludeproperty \"_*\" | ";

        command += "Get-Member | select name | format-table -hidetableheader";

        return executeCommand(command);
    }

    @Override
    public String listObject(String wmiClass, String namespace, String computerName) throws WMIException {
        String command = GETWMIOBJECT_COMMAND + wmiClass + " ";

        if (!"*".equals(namespace)) {
            command += NAMESPACE_PARAM + namespace;
        }

        command += " | ";

        command += "Select-Object * -excludeproperty \"_*\" | ";

        command += "Format-List *";

        return executeCommand(command);
    }

    @Override
    public String queryObject(String wmiClass, List wmiProperties, List conditions, String namespace, String computerName) throws WMIException {
        String command = GETWMIOBJECT_COMMAND + wmiClass + " ";

        if (!"*".equals(namespace)) {
            command += NAMESPACE_PARAM + namespace;
        }
        if(wmiProperties == null ||wmiProperties.isEmpty()){
            wmiProperties = Collections.singletonList("*");
        }

        command += " | ";

        command += "Select-Object " + Joiner.on(", ").join(wmiProperties)+" -excludeproperty \"_*\" | ";

        if(conditions!=null && !conditions.isEmpty()){
            for(String condition : conditions) {
                command += "Where-Object -FilterScript {" + condition + "} | ";
            }
        }

        command += "Format-List *";

        return executeCommand(command);
    }
}